Malicious PDF — malware analysis report

Static analysis result for SHA-256 51cdf69baef95d5c…

MALICIOUS

PDF

41.5 KB Created: 2020-08-01 19:27:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 825a28ffce169bc41d8464a4c90525d2 SHA-1: 6d64c8c7a793dc8987a4afdd2a1fde46063e0a4a SHA-256: 51cdf69baef95d5c0530f55574405ee9495f50791228b2f4db77a7d43e1d0adb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to Shopify domains, but the primary link directs to a known malicious redirector at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the target URL, reinforcing the malicious intent. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=conceptual+physics+teacher+edition+pdf
    • http://files.conwayfeedandgarden.com/uploads/1/3/0/7/130739155/45ec9cfe8f.pdf
    • http://files.erinzak.com/uploads/1/3/1/6/131607010/putilowubijufun.pdf
    • http://files.cushingparish.com/uploads/1/3/1/4/131437425/tubesato-fakavafidelavo-xogokelajofake.pdf
    • https://cdn.shopify.com/s/files/1/0433/5055/6821/files/todigepefonotaxaganu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/files/37719754814.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/59073937003.pdf
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/cete_dynamic.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/46924558804.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/birch_tree_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99781003244.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/10534550347.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/wogesajusipapugigumerifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/66099487134.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/95001644915.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/dibowixuxuzomojajowo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ed.bin
1f43c84a9292301de2495d8c6c40ed500d9e7bd0ea0be0e4c869a5e30c2a9019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 5248 bytes
font_01_sfnt_off000076c4.bin
01efd54204c9fbcff8c257b9f4bdcd06bc438065ed70ca301b730d7fb521e8b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C4 10080 bytes

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